1. The ancient archaeological site Kalibangan is in which State?
(A) Bihar
(B) Rajasthan
(C) Gujarat
(D) Maharashtra
Answer: (B) Rajasthan
Explanation: The ancient archaeological site of Kalibangan is located in the state of Rajasthan.
2. At present, Mohenjo-daro is in which country?
(A) India
(B) Afghanistan
(C) Pakistan
(D) Bangladesh
Answer: (C) Pakistan
Explanation: Mohenjo-daro is currently located in Pakistan.
3. Vikramashila University was established by the kings of which dynasty?
(A) Pala
(B) Parmar
(C) Chandel
(D) Chola
Answer: (A) Pala
Explanation: Vikramashila University was established by the Pala dynasty kings.
4. Which is the oldest among the Vedas?
(A) Atharvaveda
(B) Yajurveda
(C) Samaveda
(D) Rigveda
Answer: (D) Rigveda
Explanation: The Rigveda is considered the oldest among the Vedas.
5. Ayodhya is situated on the bank of which river?
(A) Ganga
(B) Yamuna
(C) Sarayu
(D) Gomti
Answer: (C) Sarayu
Explanation: Ayodhya is situated on the bank of the Sarayu River.
6. From when was ‘Shaka Samvat’ started?
(A) 72 AD
(B) 75 AD
(C) 78 AD
(D) 80 AD
Answer: (B) 75 AD
Explanation: The ‘Shaka Samvat’ started in 75 AD.
7. ‘Badrinath Dham’ is in which State?
(A) Uttar Pradesh
(B) Uttarakhand
(C) Himachal Pradesh
(D) Assam
Answer: (B) Uttarakhand
Explanation: ‘Badrinath Dham’ is located in the state of Uttarakhand.
8. To whose court Megasthenes sent as ambassador?
(A) Chandragupta Maurya
(B) Ashoka
(C) Harshavardhana
(D) Samudragupta
Answer: (A) Chandragupta Maurya
Explanation: Megasthenes was sent as an ambassador to the court of Chandragupta Maurya.
9. Ajanta Caves are in which State?
(A) Karnataka
(B) Maharashtra
(C) Madhya Pradesh
(D) Punjab
Answer: (B) Maharashtra
Explanation: Ajanta Caves are located in the state of Maharashtra.
10. Who was the twenty third Tirthankara of Jainism?
(A) Rishabhanatha
(B) Mahavira Swami
(C) Arishtanemi
(D) Parshvanatha
Answer: (C) Arishtanemi
Explanation: Arishtanemi was the twenty-third Tirthankara of Jainism.
11. How many Purusharthas are there?
(A) Two
(B) Four
(C) Six
(D) Sixteen
Answer: (B) Four
Explanation: There are four Purusharthas in Hindu philosophy, which are Dharma (duty/righteousness), Artha (prosperity/wealth), Kama (pleasure/desire), and Moksha (liberation).
12. Who has written Panchatantra?
(A) Kalidasa
(B) Harisena
(C) Vishnu Sharma
(D) Vishakhadatta
Answer: (C) Vishnu Sharma
Explanation: Panchatantra was written by Vishnu Sharma, an ancient Indian scholar and author.
13. Tripitakas are related to which religion?
(A) Shaivism
(B) Jainism
(C) Vaishnavism
(D) Buddhism
Answer: (D) Buddhism
Explanation: Tripitakas are sacred texts of Buddhism, also known as the Pali Canon.
14. Which dynasty ruled for the maximum period?
(A) Maurya Dynasty
(B) Sunga Dynasty
(C) Gupta Dynasty
(D) Kushana Dynasty
Answer: (C) Gupta Dynasty
Explanation: The Gupta Dynasty ruled for a significant period in ancient India and is known for its cultural and scientific achievements.
15. Which Sultan is famous for market control?
(A) Alauddin
(B) Sikandar Lodi
(C) Ibrahim Lodi
(D) Muhammad bin Tughluq
Answer: (A) Alauddin
Explanation: Alauddin Khilji, a sultan of the Delhi Sultanate, is famous for his market control measures, including the regulation of prices and markets.
16. Where is Humayun’s Tomb situated?
(A) Allahabad
(B) Delhi
(C) Jaunpur
(D) Panipat
Answer: (B) Delhi
Explanation: Humayun’s Tomb is situated in Delhi, India. It is a UNESCO World Heritage Site and a famous historical monument.
17. Nizamuddin Auliya was the follower of which Sufi sect?
(A) Qadiri
(B) Naqshbandi
(C) Chishti
(D) Suhrawardi
Answer: (C) Chishti
Explanation: Nizamuddin Auliya was a prominent Sufi saint and a follower of the Chishti Sufi order.
18. What was the name of the tenth Sikh Guru?
(A) Guru Angad
(B) Guru Ram Das
(C) Guru Tegh Bahadur
(D) Guru Gobind Singh
Answer: (D) Guru Gobind Singh
Explanation: Guru Gobind Singh was the tenth Sikh Guru and a significant figure in Sikh history.
19. Who established the Madrasa in Delhi?
(A) Iltutmish
(B) Firuz Shah Tughluq
(C) Bahlol Lodi
(D) Jalaluddin Khalji
Answer: (A) Iltutmish
Explanation: Iltutmish, a sultan of the Delhi Sultanate, is known for establishing the first madrasa (Islamic school) in Delhi.
20. Who has written Padmavat?
(A) Amir Khusrau
(B) Kabir
(C) Malik Muhammad Jayasi
(D) Chand Bardai
Answer: (C) Malik Muhammad Jayasi
Explanation: Padmavat is an epic poem written by Malik Muhammad Jayasi, a Sufi poet, in the 16th century.
21. During whose reign was Mughal painting on its zenith?
(A) Akbar
(B) Jahangir
(C) Humayun
(D) Shah Jahan
Answer: (B) Jahangir
Explanation: Mughal painting reached its zenith during the reign of Emperor Jahangir.
22. What was the name of Shivaji’s father?
(A) Dadaji Kondeo
(B) Shambhaji
(C) Shahaji
(D) Maloji
Answer: (C) Shahaji
Explanation: Shivaji’s father was named Shahaji Bhonsle.
23. Which of the following ruler ruled for the maximum perimeter?
(A) Babur
(B) Humayun
(C) Jahangir
(D) Aurangzeb
Answer: (D) Aurangzeb
Explanation: Aurangzeb ruled for the longest period among the given rulers.
24. The real name of Bhakti period saint Chaitanya was
(A) Gaur
(B) Ballabh
(C) Vishvambhar
(D) Gangadas
Answer: (C) Vishvambhar
Explanation: The real name of Bhakti saint Chaitanya was Vishvambhar.
25. In which movement did Gandhiji give the slogan Do or Die?
(A) Champaran Satyagraha
(B) Non-Cooperation Movement
(C) Civil Disobedience Movement
(D) Quit India Movement
Answer: (D) Quit India Movement
Explanation: Mahatma Gandhi gave the slogan “Do or Die” during the Quit India Movement in 1942.
26. Who started the newspapers Mahratta and Kesari?
(A) Chittaranjan Das Bal Gangadhar Tilak
(B) Bal Gangadhar Tilak
(C) Lala Lajpat Rai
(D) Gopal Krishna Gokhale
Answer: (B) Bal Gangadhar Tilak
Explanation: Bal Gangadhar Tilak started the newspapers Mahratta and Kesari.
27. ‘Vande Mataram’ is taken from which book?
(A) Anandamath
(B) Gitanjali
(C) Bharat-Bharati
(D) Kamayani
Answer: (A) Anandamath
Explanation: The song ‘Vande Mataram’ is taken from the novel ‘Anandamath’ written by Bankim Chandra Chatterjee.
28. Satyarth Prakash is associated with
(A) Arya Samaj
(B) Brahmo Samaj
(C) Prarthana Samaj
(D) Ramakrishna Mission
Answer: (A) Arya Samaj
Explanation: ‘Satyarth Prakash’ is a book associated with Arya Samaj, written by Swami Dayananda Saraswati.
29. Which book is written by Dr. Rajendra Prasad?
(A) India Wins Freedom
(B) India Divided
(C) The Discovery of India
(D) Hind Swaraj
Answer: (B) India Divided
Explanation: Dr. Rajendra Prasad wrote the book ‘India Divided.’
30. In November 1942, Jayaprakash Narayan escaped from which jail?
(A) Bettiah
(B) Motihari Jail
(C) Hajipur Jail
(D) Hazaribagh Central Jail
Answer: (B) Motihari Jail
Explanation: Jayaprakash Narayan escaped from Motihari Jail in November 1942.
31. In March 1857, where did Mangal Pandey start the Revolt?
(A) Delhi
(B) Barrackpore
(C) Meerut
(D) Kanpur
Answer: (B) Barrackpore
Explanation: Mangal Pandey started the Revolt at Barrackpore in March 1857.
32. Who helped Lord William Bentinck in abolition of Sati system?
(A) Keshav Chandra Sen
(B) Dayananda Saraswati
(C) Ishwar Chandra Vidyasagar
(D) Raja Rammohan Roy
Answer: (D) Raja Rammohan Roy
Explanation: Raja Rammohan Roy played a significant role in helping Lord William Bentinck abolish the Sati system.
33. Who established Satyashodhak Samaj in 1873?
(A) Narayan Guru
(B) B. R. Ambedkar
(C) Jyotirao Phule
(D) Ramaswamy Naicker
Answer: (C) Jyotirao Phule
Explanation: Jyotirao Phule established the Satyashodhak Samaj in 1873.
34. Who was the Governor-General of India when the Universities at Calcutta, Bombay and Madras were founded?
(A) Lord William Bentinck
(B) Lord Dalhousie
(C) Lord Canning
(D) Lord Elgin
Answer: (A) Lord William Bentinck
Explanation: Lord William Bentinck was the Governor-General of India when the Universities at Calcutta, Bombay, and Madras were founded.
35. Which event occurred in 1922?
(A) Starting of Non-Cooperation Movement
(B) Chauri Chaura Incident
(C) Jallianwala Bagh Massacre
(D) Arrival of Simon Commission
Answer: (B) Chauri Chaura Incident
Explanation: The Chauri Chaura Incident occurred in 1922 during the Non-Cooperation Movement.
36. ______ is the largest town of Uttar Pradesh by population.
(A) Agra
(B) Allahabad
(C) Kanpur
(D) Varanasi
Answer: (C) Kanpur
Explanation: Kanpur is the largest town of Uttar Pradesh by population.
37. Which one of the following pairs is not correctly matched?
(A) Sutlej – Guru Gobind Sagar
(B) Kaveri – Krishna Raja Sagar
(C) Chambal – Gandhi Sagar
(D) Godavari – Nagarjuna Sagar
Answer: (D) Godavari – Nagarjuna Sagar
Explanation: Godavari is not associated with Nagarjuna Sagar.
38. Marwar lies in the ____ part of Rajasthan.
(A) western
(B) eastern
(C) northern
(D) southern
Answer: (A) western
Explanation: Marwar is located in the western part of Rajasthan.
39. Panna is famous for ____ mining.
(A) gold
(B) diamond
(C) silver
(D) platinum
Answer: (B) diamond
Explanation: Panna is famous for diamond mining.
40. Ranthambore National Park lies near
(A) Jaipur
(B) Ranakpur
(C) Raipur
(D) Jabalpur
Answer: (A) Jaipur
Explanation: Ranthambore National Park is located near Jaipur.
41. Gangasagar is
(A) a reservoir on the Ganga river
(B) a pilgrim centre
(C) a sea off the Ganga river
(D) an atomic power station in Uttar Pradesh
Answer: (C) a sea off the Ganga river
Explanation: Gangasagar is a sea off the Ganga river and is known as a pilgrim center.
42. Sardar Sarovar Dam is located on _____ river.
(A) Tapi
(B) Sabarmati
(C) Narmada
(D) Mahi
Answer: (C) Narmada
Explanation: Sardar Sarovar Dam is located on the Narmada river.
43. Kanyakumari is situated in
(A) Tamil Nadu
(B) Kerala
(C) Karnataka
(D) Andhra Pradesh
Answer: (A) Tamil Nadu
Explanation: Kanyakumari is situated in the state of Tamil Nadu.
44. Pangong Lake lies in
(A) the State of Jammu and Kashmir
(B) the Union Territory Jammu and Kashmir
(C) the Union Territory Ladakh
(D) the State of Himachal Pradesh
Answer: (C) the Union Territory Ladakh
Explanation: Pangong Lake lies in the Union Territory of Ladakh.
45. Lignite is mined at
(A) Taicher
(B) Balharshah
(C) Singarent
(D) Neyvell
Answer: (D) Neyvell
Explanation: Lignite is mined at Neyvell.
46. Kodagu is famous for
(A) tea
(B) coffee
(C) cocoa
(D) banana chips
Answer: (B) coffee
Explanation: Kodagu, also known as Coorg, is famous for its coffee production.
47. _____ is the steel producing centre in Odisha.
(A) Bokaro
(B) Bhilai
(C) Bhadravati
(D) Rourkela
Answer: (D) Rourkela
Explanation: Rourkela is a major steel-producing center in Odisha.
48. ______ is the highest peak in India
(A) Mount Everest
(B) K2
(C) Kanchenjunga
(D) Nanga Parbat
Answer: (A) Mount Everest
Explanation: Mount Everest is the highest peak in India and the world.
49. _____ is the main rainy season in Tamil Nadu
(A) April-May
(B) June-September
(C) October-December
(D) January-March
Answer: (C) October-December
Explanation: The main rainy season in Tamil Nadu is from October to December.
50. _____ has exploited maximum wind energy potential
(A) Tamil Nadu
(B) Andhra Pradesh
(C) Rajasthan
(D) Gujarat
Answer: (A) Tamil Nadu
Explanation: Tamil Nadu has exploited the maximum wind energy potential in India.
51. What is the name of the fifth exploratory vehicle for the Red Planet ‘Mars’ chosen recently by a seventh grade student, Alex Mather?
(A) Curiosity
(B) Sojourner
(C) Perseverance
(D) Spirit
Answer: (C) Perseverance
Explanation: The fifth exploratory vehicle for the Red Planet ‘Mars’ was named ‘Perseverance.’ It was chosen recently by a seventh-grade student, Alex Mather, through NASA’s “Name the Rover” essay contest.
52. Who among the following was administered oath as the Information Commissioner by Bimal Julka, soon after taking his oath as the Chief Information Commissioner in the Central Information Commission?
(A) Amita Pandove
(B) Sudhir Bhargava
(C) Amitava Bhattacharya
(D) Divya Prakash Sinha
Answer: (D) Divya Prakash Sinha
Explanation: Divya Prakash Sinha was administered the oath as the Information Commissioner by Bimal Julka, soon after taking his oath as the Chief Information Commissioner in the Central Information Commission.
53. ‘Vivad Se Vishwas Bill, 2020’ was approved by the Lok Sabha in March 2020. It is related with
(A) indirect taxes
(B) direct taxes
(C) customs duty
(D) excise duty
Answer: (B) direct taxes
Explanation: ‘Vivad Se Vishwas Bill, 2020’ was related to direct taxes and was approved by the Lok Sabha in March 2020.
54. The technology behind cryptocurrencies is known as
(A) Bathwater
(B) Fintech
(C) Investopedia
(D) Blockchain
Answer: (D) Blockchain
Explanation: The technology behind cryptocurrencies is known as Blockchain.
55. Who was the founder of the Australian Associated Press (AAP) which recently announced its closure after 85 years in business?
(A) Keith Murdoch
(B) John Malone
(C) Brian Roberts
(D) Michael Bloomberg
Answer: (A) Keith Murdoch
Explanation: Keith Murdoch was the founder of the Australian Associated Press (AAP), which recently announced its closure after 85 years in business.
56. The report of the interlocutors appointed by the Supreme Court to talk to protestors who were opposing CAA at Shaheen Bagh, Delhi to move to a site which does not inconvenience the public, was submitted before which Bench?
(A) Justices A. M. Khanwilkar and K. M. Joseph
(B) Justices S. K. Kaul and K. M. Joseph
(C) Justices N. V. Ramana and A. K. Mishra
(D) Justices Ajay Rastogi and S. K. Kaul
Answer: (B) Justices S. K. Kaul and K. M. Joseph
Explanation: The report of the interlocutors appointed by the Supreme Court for the Shaheen Bagh protests was submitted before the Bench of Justices S. K. Kaul and K. M. Joseph.
57. What is the name of the prison in the UK from where Julian Assange was brought to a Court of the District Judge Vanessa Baraitser in February 2020?
(A) Berwyn Prison
(B) Bedford Prison
(C) Belmarsh Prison
(D) Birmingham Prison
Answer: (C) Belmarsh Prison
Explanation: Julian Assange was brought to a Court of the District Judge Vanessa Baraitser in February 2020 from Belmarsh Prison in the UK.
58. In February 2020, the Supreme Court said in a judgement that an individual does not have a fundamental right to claim reservation in appointments and promotions. It set aside which Court’s ruling that had quashed a State Government’s decision to fill all the posts in public services without providing any reservations to SCs/STs?
(A) Patna High Court
(B) Karnataka High Court Court
(C) Himachal Pradesh High
(D) Uttarakhand High Court
Answer: (B) Karnataka High Court
Explanation: The Supreme Court set aside the Karnataka High Court’s ruling that had quashed a State Government’s decision to fill all the posts in public services without providing any reservations to SCs/STs.
59. Which newspaper carries a weekly column, ‘Word of the Week’ by Shashi Tharoor?
(A) Times of India, New Delhi
(B) The Hindu
(C) Hindustan Times, New Delhi
(D) Indian Express, New Delhi
Answer: (D) Indian Express, New Delhi
Explanation: Shashi Tharoor’s weekly column ‘Word of the Week’ appears in the Indian Express, New Delhi.
60. Who was defeated by Novak Djokovic in the Australian Open Tennis Men’s Singles Final 2020?
(A) Rafael Nadal
(B) Dominic Thiem
(C) Roger Federer
(D) Alexander Zverev
Answer: (B) Dominic Thiem
Explanation: Novak Djokovic defeated Dominic Thiem in the Australian Open Tennis Men’s Singles Final 2020.
61. Name the Mayor of Agra who handed over a 12-inch silver key to the US President Donald Trump when he visited the city recently.
(A) Baby Rani Maurya
(B) Inderjeet Singh Arya
(C) Anjula Singh Mahaur
(D) Naveen Jain
Answer: (B) Inderjeet Singh Arya
Explanation: Inderjeet Singh Arya, the Mayor of Agra, handed over a 12-inch silver key to US President Donald Trump during his visit to the city.
62. The recent ruling by the Supreme Court that all women officers are entitled to the permanent commission in the Indian Army concluded a struggle that started in 2003. Who was the first petitioner?
(A) Babita Puniya
(B) Sandhya Yadav
(C) Mitali Madhumita
(D) Aishwarya Bhati
Answer: (A) Babita Puniya
Explanation: Babita Puniya was the first petitioner in the case that eventually led to the Supreme Court’s ruling that all women officers are entitled to permanent commission in the Indian Army.
63. Who among singers read young poet, Amir Aziz a couplet of the following recently?
(A) Bob Dylan
(B) Bruce Springsteen
(C) Richard Clayderman
(D) Roger Waters
Answer: (D) Roger Waters
Explanation: Roger Waters, the renowned musician and singer, read a couplet of young poet Amir Aziz during an event.
64. Which Republican Senators voted to convict the following among convict in his impeachment proceedings in the US President, Donald Trump, in February 2020?
(A) Lamar Alexander
(B) Mitt Romney
(C) Bill Cassidy
(D) Jerry Moran
Answer: (B) Mitt Romney
Explanation: Senator Mitt Romney was the only Republican Senator who voted to convict President Donald Trump in his impeachment proceedings in February 2020.
65. The US astronaut, Christina Koch, broke whose record as the single longest stay in space by a woman?
(A) Jessica Meir
(B) Sunita Williams
(C) Peggy Whitson
(D) Anne McClain
Answer: (C) Peggy Whitson
Explanation: US astronaut Christina Koch broke the record of Peggy Whitson as the woman with the single longest stay in space.
66. Where was ‘Azadi Ke Diwane Museum’ inaugurated in March 2019?
(A) Amer Fort, Jaipur
(B) Red Fort, Delhi
(C) Red Fort, Agra
(D) Kangra Fort, Kangra
Answer: (B) Red Fort, Delhi
Explanation: ‘Azadi Ke Diwane Museum’ was inaugurated at the Red Fort in Delhi in March 2019.
67. What is the title of Viswanathan Anand’s autobiography?
(A) Mind Twister
(B) Mind Games
(C) Mind Moves
(D) Mind Master
Answer: (D) Mind Master
Explanation: The title of Viswanathan Anand’s autobiography is “Mind Master.”
68. Who was elected as the eighth Prime Minister of Malaysia in March 2020?
(A) Muhyiddin Yassin
(B) Mahathir Mohamad
(C) Najib Razak
(D) Abdullah Ahmad Badawi
Answer: (A) Muhyiddin Yassin
Explanation: Muhyiddin Yassin was elected as the eighth Prime Minister of Malaysia in March 2020.
69. Where is Chapchar Kut festival celebrated?
(A) Nagaland
(B) Sikkim
(C) Mizoram
(D) Manipur
Answer: (C) Mizoram
Explanation: Chapchar Kut festival is celebrated in Mizoram.
70. Who was the Chief Guest on the Republic Day of India in 2020?
(A) President of Sri Lanka – Gotabaya Rajapaksa
(B) President of Brazil – Bolsonaro
(C) President of Portugal – Marcelo Rebelo de Sousa
(D) President of Myanmar – Win Myint
Answer: (A) President of Sri Lanka – Gotabaya Rajapaksa
Explanation: Gotabaya Rajapaksa, the President of Sri Lanka, was the Chief Guest on the Republic Day of India in 2020.
71. Which of the following radiations is used in mobile communication?
(A) Infrared
(B) Ultraviolet
(C) Microwave
(D) X-ray
Answer: (C) Microwave
Explanation: Microwaves are used in mobile communication due to their ability to transmit information over long distances and through obstacles like buildings.
72. Which statement about LEDs (Light-Emitting Diodes) is not correct?
(A) LED light sources consume less electricity.
(B) LEDs have a longer lifetime than light bulbs.
(C) LEDs are available in colors such as red, green, yellow, blue, and white.
(D) LEDs use mercury which is harmful to humans.
Answer: (D) LEDs use mercury which is harmful to humans.
Explanation: LEDs do not use mercury, making them an environmentally friendly lighting option.
73. The motion of the needle of a sewing machine is:
(A) periodic
(B) rectilinear
(C) circular
(D) irregular
Answer: (A) periodic
Explanation: The needle of a sewing machine moves in a regular, back-and-forth (periodic) motion.
74. The unit of potential difference is:
(A) coulomb
(B) watt
(C) volt
(D) ohm
Answer: (C) volt
Explanation: The unit of potential difference (voltage) is the volt (V).
75. The human eye forms the image of an object at its:
(A) cornea
(B) iris
(C) pupil
(D) Retina
Answer: (D) Retina
Explanation: The retina is the part of the human eye that forms the image of an object.
76. The colour of light that bends the most while passing through a prism is:
(A) yellow
(B) blue
(C) red
(D) violet
Answer: (D) violet
Explanation: Violet light bends the most when passing through a prism because it has the shortest wavelength among visible colors.
77. Forces of action and reaction are:
(A) always equal only
(B) always opposite only
(C) always equal and opposite
(D) always equal and in the same direction
Answer: (C) always equal and opposite
Explanation: According to Newton’s third law of motion, forces of action and reaction are always equal in magnitude and opposite in direction.
78. The process of change of state from gaseous to liquid or solid state is called:
(A) evaporation
(B) condensation
(C) dew formation
(D) liquidization
Answer: (B) condensation
Explanation: Condensation is the process by which a gas changes into a liquid or solid state, usually by cooling.
79. Cryogenic engines are used:
(A) atomic reactors
(B) agriculture
(C) railways
(D) rockets
Answer: (D) rockets
Explanation: Cryogenic engines are used in rockets to handle and store extremely cold fuels and oxidizers.
80. A device that is used to save an electric circuit is called:
(A) fuse
(B) switch
(C) filament
(D) terminals
Answer: (A) fuse
Explanation: A fuse is a device used to protect an electric circuit from excessive current by melting and breaking the circuit when the current exceeds a certain limit.
81. An ionic compound has unit cell consisting
A ions at the corners of a cube and
B ions at the centres of the faces of the cube.
The empirical formula of the compound would be
(A) A3B
(B) AB3
(C) A2B
(D) AB
Answer: (A) A3B
Explanation: In this type of unit cell, there are 8 A ions at the corners, and each corner ion is shared by 8 adjacent unit cells. There are also 6 B ions at the centers of the faces, and each face-centered ion is shared by 2 adjacent unit cells. Therefore, the empirical formula is A3B.
82. Which of the following compounds is metallic and ferromagnetic?
(A) TiO₂
(B) CrO₂
(C) VO₂
(D) MnO₂
Answer: (C) VO₂
Explanation: VO₂ is a compound that exhibits both metallic properties and ferromagnetism. It undergoes a metal-to-insulator transition, known as the Mott transition, at a critical temperature, making it a unique material with these properties.
83. In a factory, 40 kg of calcium is produced in 2 hours. If the capacity of flow of current is 50%, then how much aluminium can be obtained by passing the same current for
(A) 22 kg
(B) 18 kg
(C) 9 kg
(D) 27 kg
Answer: (C) 9 kg
Explanation: To calculate the amount of aluminum produced, you can use the Faraday’s law of electrolysis. Since the flow of current is at 50% capacity, you need to consider that. The molar mass of calcium is greater than that of aluminum. Therefore, for the same amount of current, less aluminum is produced compared to calcium, and the correct answer is 9 kg.
84. If 𝐸° value of a given cell is 1-1 V at 298 K temperature, then what is the value of equilibrium constant?
(A) 10^-37
(B) 10^37
(C) 10^-73
(D) 10^73
Answer: (A) 10^-37
Explanation: The equilibrium constant (K) for a cell reaction can be calculated using the Nernst equation. In this case, the negative value of E° suggests that the cell reaction is not feasible, resulting in a very low equilibrium constant, which is 10^-37.
85. The standard electrode potentials of three metals x, y and z are -1.2 V, +0.5 V, and -3.0 V. The order of reducing agents of the three metals is.
(A) y > z > x
(B) y > x > z
(C) z > x > y
(D) x > y > z
Answer: (B) y > x > z
Explanation: The reducing agent is a species that gets oxidized and loses electrons. In this case, metals with higher standard electrode potentials are better at losing electrons and are stronger reducing agents. Therefore, the correct order is y > x > z.
86. When the initial concentration of the reactant is doubled, half-life period of a zero-order reaction
(A) remains unchanged
(B) is halved
(C) is tripled
(D) is doubled
Answer: (D) is doubled
Explanation: In a zero-order reaction, the rate of the reaction is independent of the concentration of the reactant. Therefore, doubling the initial concentration of the reactant will result in a doubling of the time it takes for the reactant to be consumed by half, which is the definition of the half-life period.
87. Which of the following is the best substance for coagulation of gold sol?
(A) KNO3
(B) K4[Fe(CN)6]
(C) MgCl2
(D) K3PO4
Answer: (B) K4[Fe(CN)6]
Explanation: Gold sol can be coagulated using substances that have a high charge and can neutralize the charges on gold particles. K4[Fe(CN)6] is one such substance that can effectively coagulate gold sol by forming complexes with gold ions, causing them to come together and form larger particles.
88. Which of the following nuclei has zero spin?
(A) 2H
(B) 14N
(C) 4He
(D) 10B
Answer: (C) 4He
Explanation: The nucleus of 4He (helium-4) has zero spin because it has an even number of protons and neutrons, which results in the cancellation of angular momentum, leading to zero spin.
89. The ore which is found in abundance in India is
(A) monazite
(B) fluorspar
(C) Bauxite
(D) magnetite
Answer: (C) Bauxite
Explanation: Bauxite is the ore that is found in abundance in India. It is the primary source of aluminum and is widely distributed in various states of India.
90. For the process, dry ice → CO2
(A) Δ𝐻 is positive and Δ𝒮 is negative
(B) Δ𝐻 is negative and Δ𝒮 is positive
(C) both Δ𝐻 and Δ𝒮 are negative
(D) both Δ𝐻 and Δ𝒮 are positive
Answer: (A) Δ𝐻 is positive and Δ𝒮 is negative
Explanation: The process of dry ice (solid CO2) sublimating to form gaseous CO2 is endothermic, which means it absorbs heat from its surroundings. Therefore, Δ𝐻 (change in enthalpy) is positive. Since dry ice sublimation results in an increase in randomness and entropy (Δ𝒮), Δ𝒮 is positive. Hence, the correct option is (A).
91. Organelles can be separated from cell homogenate through
(A) X-ray diffraction
(B) chromatography
(C) auto-radiography
(D) differential centrifugation
Answer: (D) differential centrifugation
Explanation: Organelles in a cell can be separated from a cell homogenate through a process called differential centrifugation. This technique uses differences in the size, shape, and density of organelles to separate them by subjecting the homogenate to varying speeds of centrifugation.
92. When does pairing/synapsis (bivalent formation) occur in meiosis?
(A) During aygotene
(B) During diplotene
(C) During pachytene
(D) During leptotene
Answer: (C) During pachytene
Explanation: Pairing or synapsis, also known as bivalent formation, occurs during the pachytene stage of meiosis. During this stage, homologous chromosomes come together and undergo genetic recombination, leading to the exchange of genetic material between them.
93. Mutualism and protocooperation are
(A) negative interactions
(B) positive interactions
(C) Both of the above
(D) None of the above
Answer: (B) positive interactions
Explanation: Mutualism and protocooperation are both types of positive interactions between organisms. In mutualism, both organisms benefit, while in protocooperation, one organism benefits, and the other is neither helped nor harmed.
94. How does trypsin differ from pepsin?
(A) Trypsin digests protein in an alkaline medium while pepsin does so in an acidic medium
(B) Trypsin digests protein in an acidic medium while pepsin does so in an alkaline medium
(C) Both of the above
(D) None of the above
Answer: (A) Trypsin digests protein in an alkaline medium while pepsin does so in an acidic medium
Explanation: Trypsin is a digestive enzyme that works in an alkaline environment (e.g., the small intestine) and digests proteins into smaller peptides, while pepsin is a digestive enzyme that works in the acidic environment of the stomach to digest proteins.
95. Which of the following hormones are neurotransmitters?
(A) Cholecystokinin and acetylcholine
(B) Acetylcholine and secretin
(C) Adrenaline and acetylcholine
(D) Cholecystokinin and adrenaline
Answer: (C) Adrenaline and acetylcholine
Explanation: Adrenaline and acetylcholine are both neurotransmitters and hormones. They play essential roles in both the nervous system and as hormones in the endocrine system.
96. The advancement in genetic engineering has been possible due to the discovery of
(A) exonuclease
(B) transposon
(C) Concogene
(D) restriction endonuclease
Answer: (D) restriction endonuclease
Explanation: The advancement in genetic engineering has been possible due to the discovery of restriction endonucleases. These enzymes are used to cut DNA molecules at specific sequences, allowing scientists to manipulate and modify DNA for various purposes, including genetic engineering.
97. A queen honeybee lays eggs of
(A) one type from which all castes develop
(B) two types, one forming queen and workers and the other forming drones
(C) three types forming queen, drones, and workers
(D) Unfertilized eggs die while fertilized ones form all castes
Answer: (B) two types, one forming queen and workers and the other forming drones
Explanation: A queen honeybee lays eggs of two types: fertilized eggs, which develop into workers and queens, and unfertilized eggs, which develop into drones. The caste of the offspring depends on whether the egg is fertilized or not.
98. Ribosomes of bacteria, mitochondria, and chloroplasts are of
(A) 50S type
(B) 30S type
(C) 80S type
(D) 70S type
Answer: (D) 70S type
Explanation: Ribosomes in bacteria, mitochondria, and chloroplasts are of the 70S type. This refers to their sedimentation rate in centrifugation and indicates their size and composition.
99. Ray fungi are
(A) actinomycetes
(B) ascomycetes
(C) basidiomycetes
(D) phycomycetes
Answer: (C) basidiomycetes
Explanation: Ray fungi belong to the phylum Basidiomycota. These fungi are known for producing mushrooms and include many edible and non-edible species.
100. Which of the following is produced during water stress that brings about stomatal closure?
(A) Coumarin
(B) Ferulic acid
(C) Abscisic acid
(D) Ethylene
Answer: (C) Abscisic acid
Explanation: Abscisic acid (ABA) is a plant hormone produced in response to water stress. It plays a crucial role in inducing stomatal closure, reducing water loss from the plant, and helping the plant adapt to drought conditions.